Woodworking-machine.



N. GREIN. WOODWORKING MACHINE. APPLICATION FILED maze, 1913.

1,100, 1 30. Patnted June 16, 1914.

2 SHEETS-SHEET 1.

4 55! l I 5 /I6 IS/ 5 45 I :L 34 44- 54 I Z0 0 Fig./. 34 f N. GREIN.

I WOODWORKING MACHINE. APPLICATION FILED AUG. 28, 1913.

1,100,1 30. Patented June 16,1914.

2 SHEETSSHEET Z.

ELIE! V as NICHOLAS GREIN, OF MILWAUKEE, WISCONSIN.

WOODWORIHNG-MACHINE.

1,1tlth13tl.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed August 28, 1913. Serial No. 787,052.

. specification.

This invention relates to improvements in the construction of machines for producing bodies having either an elliptical cross section or a similarly formed recess therem, and is especially applicable to that class of devices known as universal wood-working machines.

An object of the invention is to provide a machine for producing bodies having either an elliptical cross-section or a similarly formed recess therein, which is simple in construction and efficient in operation.

One of the more specific ob ects of the in vention is to provide a mechanism for cans ing a forming implement to move alon the path defining a theoretically correct el ipse.

Another object is to provide means for permitting variation in the form and size of the elliptical path described by the forming implement of the mechanism.

Still another object is to provide simple and efiective means for actuating and for permitting adjustment of the position of the forming implement.

A further object is to provide a device which will produce either bodies of revolution having an elliptical cross-section, or

elongated cylindrical or conical bodies hav ing similar crosssections.

Another ob ect is to provide a device which may be readily adjusted and manipulated to effectively form the various bodies to be constructed.

A clear conception of an embodiment of the invention may be had by referring to the drawings accompanying and forming a part of this specification, in which like reference characters designate the same or similar parts in' the various views.

Figure 1 is a transverse vertical section through a wood-working machine showinga fragment of a body being formed. Flg. 2 IS. a fragmentary rear end elevation of a woodworking machine, the view being taken in the direction of the arrow A. in Fig.1. Fig. 3 is a fragmentary front end elevation of a wood-working machine, the view being taken in the direction of the arrow B in Fig. 1. Fig. a is a fragmentary transverse horizontal section through some of the elements of a wood-working machine, showing the relative positions of the supporting elements in dot and dash lines, the section being taken alongthe irregular line LIV- IV of Fig. 1, looking in the direction of the. arrow. Fig. 5 is a slightly enlarged diagram showing one form of elliptical path which the forming implement may be caused to travel. Fig. 6 is a similar diagram showing another form of elliptical path which the forming implement may be caused to travel. F 7 is a similar diagram showing another form of elliptical path which the forming implement may be caused to travel.

Thedcvice as disclosed herein is es ecially adapted for forming bodies of woo but it is not desired to limit theinvention to such application.

, The invention is applicable wherever it is desired to form a body having a semi-elliptical or semi-circular cross-section. As disclosed, the machine is especially applicable in the art of pattern making, in which it is often desirable to form half-patterns having an elliptical or circular crosssection, and in 1 which it may also be desirable to form core boXes. having recesses of semi-elliptical or semi-circular cross-section therein.

The'terms horizontal, vertical, front, rear and other terms of a similar nature, as used in this specification are merely used to facilitate definition of the invention and it is not intended to limit the disposition of the elements to that disclosed.

The supporting column 1 is fixed at its lower end to any suitable either stationary or movable means, not shown. The cross shaft 3 is vertically and angularly adjustably secured to the column 1 by means of the cross shaft supporting bracket 4 which may be moved both along and around the column 1 and clamped thereto in any desired position. The frame supporting bracket 55 is laterally and angularly adjustably secured integral with the guides 2 of the frame and bearing in the lower bracket 9,

by means, ofthe The upper lever bracket 12 has the end I has a transverse cross head guide slot 29 formed therein. The cross head block snugly fits the slot 29 and has a central bore which forms a bearing for the pivot of the cross head bracket 44.

The upper and lower vertically slidable guide shaft brackets 8, 9 respectively, are formed with slides which closely fit the frame guides 2, and are rigidly connected to each other by means of the vertical guide shaft 7 which coacts with the'bearing 6. The upper horizontal shaft 10 has a bearing in the upper bracket 8, and has a forwardly projecting end to which the bevel gear 31 and upper lever bracket 12 are rigidly secured. The lower, horizontal shaft ll has a and has projecting ends to the forward of which the bevel gear 33 and lower lever bracket 13 are rigidly secured, and to the rearward of which the worm-wheel and rear lower lever bracket 14 are rigidly secured. The gear shaft 16 is vertically supported in bearings formed in the brackets 8, 9 and has beveled gears 32, 34 fixed to its respective upper and lowerends, which mesh with the bevel gears 31, 33 respectively. The lower bracket 9 forms bearings for the worm shaft 54, intermediate which bearings the worm 39 which meshes with the wormwheel 40 is fixed to the shaft 54. The actuating means,- which for the purpose of sim plifying the disclosure, is shown as a hanelwheel but which may be of any otherodesirable form, is connected with an overhangingend of the shaft 54.

. The rear. lower lever bracket 14 forms bearings for the vertical screw-threaded lever shaft 20. 'The adjusting hand-wheel 42 serves as ameans for permitting rotation of the shaft 20, theshaft 20 and hand-wheel 42 being normally locked in-position by means of the lock nut 43. The cross head bracket 44 is mounted upon the screw-threaded lever shaft 20 and is adjustable along theshaft 20 hand-wheel 42.

' portions of the screw-threaded upper lever shaft 18 fixed thereto. The bevel gear 46 has a screw-threaded central bore which coacts with the screw-threaded shaft 18 so that as the gear 46 is rotated it moves along the shaft 18. The upper adjusting bracket 50 has guiding portions which embrace the shaft 20 and which coact with the end surfaces of the hub of the gear 46. The upper adjusting shaft 52 is rotatably mounted in a bearing formed in the bracket 50 and has pro ecting ends to the one of which the bevel gear 47.which m'eshes with the bevel gear 46 is secured, and to the other of which the bevel gear 49 is fixed.

- The lower lever bracket 13 has the end portions of the screw-threaded lower lever shaft 19 fixed thereto. The bevel gear 36 has a screw-threaded central bore which coacts with the screw-threaded shaft 19 so that as the gear 36 is rotated. it moves along the shaft 19. The lower adjusting bracket 51 has guiding portions which embrace the shaft 19 and which coact with the end surfaces of the hub of the gear 36. The lower adjusting shaft 53 is rotatably mounted in a bearing formed in the bracket 51 and has projecting ends to the one of which the bevel gear'35 which meshes with the bevel gear 36, is secured, and to the other of which the bevel gear 37 is fixed.

The adjusting brackets 50, 51 are suitably guided in their respective lever brackets 12, 13 andhave parallel projections which form supporting bearings for the implement carrier arm 15. The carrier arm 15 has bearings for the vertical adjusting shaft 17, formed thereon. The adjusting shaft 17 is "rotatable by means of a hand-wheel 41 and has bevel gears 48, 38 which mesh with the bevel gears 49, 37 respectively, secured thereto.

To the lower extremity of the implement carrier arm 15, a direct driven forming implement or cutter 21 is adjustably secured. As disclosed, the cutter 2l is adapted for rotation about its axis by means of a directconn'ected electric motor 24, although various 1 devices for actuating the cutter 21 may be employed without departing from the scope of the present invention. The motor 24 and cutter 21 are angularly adjustable relative to the carrier arm 15 by means of the imple-' .ment positioning clamp 27. The cutter 21 is located directly above and in close proximity to the body 22 which is to be formed. The body 22 is supported upon a supporting carriage comprising a rotatable means or table 23 carried by the laterally movable means or table 25 and adapted to be locked thereto. The table 25 is laterally movable along the tracks 26 and is adapted to be stationarily fixed upon the tracks.

During the normal operation of the device,

the body to be formed is placed upon the supporting table, and, depending upon thecharacter of the shape desire is either slowly rotated upon the table 23 or fed slowly along the tracks 26. The implement or cutter 21 after having been properly positioned is rotated at a very high rate of speed by means of its driving motor 24. The cutter 21 is then brought in contact with the body 22 by manipulating the various adjusting devices of the machine, and is caused to move along an elliptical or circular path by rotating the operating means or handwheel 45. Rotation of the hand-wheel 45 causes the shaft 54 and worm 39 torotate,the rotation of which elements is transmitted through the worm-wheel 40 to the lower horizontal shaft 11. As the shaft 11 rotates, it swings the lower lever brackets 13, 14 about the axis of the shaft 11. as a center. The swinging of the bracket 14 and the elements carried thereby, causes the cross-head block to move along the slot 29 of the temporarily stat-ionarily held bracket 28, thus causing the brackets 8, 9, vertical guide shaft 7 connecting the same and the elements carried thereby, to move vertically along the guides 2 and bearings 6. The extent of this vertical movement will depend upon the distance between the axes of the shaft 11 and cross-head pivot bracket 44.

Simultaneously with the vertical move- I ment of the brackets 8, 9 and of the elements the difference between the distances X and carried thereby, the lo-werlever bracket 13 is swung through an arc and the u per lever bracket 12 is caused to swing through a similar arc bysmeans of the vertical gear shaft 16, the shaft 10' and the 'bevel gears 33, 34, 32, 31 which positively drivingly connect the brackets 13, 12. As the effective lengths of the levers formed by the brackets 13, 12 are preferably equal to each other, the elements connecting and carried by the swinging ends of these levers will take parallel positions during the movement of the levers. The axis of the cutter 21 which is one of the elements carried by the levers, will therefore assume parallel posit-ions independent of its angularity relative to the supporting means. I

By referring to the diagram ofFig. 5, it

will be noted that as the brackets 8, 9 and the elements carried thereby are moved vertically at a definite rate of speed by means of the cross-head block 30, and as the cutter 21 is simultaneously moved through the arc of a circle about the axis of the vertically moving shaft 11 as a center, a theoretically true ellipse is described by the cutter 21. The transverse or principal axis of the ellipse thus described is equal to double the distance marked X which distance corresponds to the distance between the axes of the shafts 11 and 53. The conjugate or minor axis of the ellipse is equal to double Y, the latter of which corresponds to the distanoe between the axes of the shaft 11 and cross-head bracket 44. The movement of the cutter 21 may be continued to cause. the cutter to traverse the entire ellipse or only a partial ellipse as desired.

The diagram of Fig. 6 of ellipse tive lengt s of the lever shafts 19, 18 by represents a form amounts Z. This adjustment of the device is made .by rotating the adjusting handwheel 41 thus causing the adjusting shaft 17, gears 38, 37, 48, 49, shafts53, 52 and gears 35, 36, 47 46 to rotate. The rotation of the gears 36, 46 causes them to move along their respective screw-threaded shafts 19, 18 and to alter-the distances between the axes of the shafts 53, 52 and the roduced by shortening the effecshafts 11, 10 respectively, by carrying their respective brackets 51, 50 with the elements supported thereby topositions corresponding tothe new. positions assumed by the gears36, 46. The positive gear and shaft connection. between the gears 36, 46 causes these gears during adjustment thereof to moveequal amounts along their respective shafts and insures retention of equal throws of the upper and lower levers.

The diagram of Fig. 7 represents one form of ellipse produced by varying the effective lengths of the rear lever shaft 20. by an amount U. This adjustment of the device may be made by loosening the lock but 43 and rotating the shaft 20 by" means of the hand-wheel 42. Rotation of the shaft 20 causes the same due to its screw-threaded coaction, to move .within the cross head bracket 44 and to shift the rear lower lever and the elements connected thereto; vertiwhy. If the rotation of the shaft 20 is con- I tinued' until the axis of the shaft 11 coincides with the axis of the crosshead pin, the

path described by the cutter 21 will be a circle having a radius equal to the distance be tween the axes of the shaftsll and 53. If the axis of the shaft 53 is brought in line with the axis of the cross-head pin, the path described by the cutter 21 will be a straight line parallel to the center line of the slot 29.

It will thus be noted that with the various adjustments provided for the upper and lower levers, the cutter 21 may be caused to move along an elliptical pathof any desired form. If the pivots of these levers are below their swinging ends, the elliptical path described by the cutter 21 will be above the transverse axis of the ellipse, while if the lever pivots are above the swinging lever ends, the elliptical path described .by the cutter 21 willbe below the transverse axis of the ellipse.

If it is desired to form either a, body of revolution having a semi-elliptical or semicircular cross-section, or a similarly formed recess in a body, the body 22 isplaced upon the table 23 and rotated about a fixed' axis simultaneously with *th movement of the cutter 21 along the desired elliptical or circular path. If it is. desired to form either an elongated semi-cylindrical body having a semi-elliptical or semi-circular cross-section,

-or a similarly formed elongated recess in a body, the body 22 is placed upon the tables 23, 25 and moved laterally along the tracks 26 simultaneously with the movement of the cutter 21 along the desired elliptical or circular path. 1 i

The combined element's supported from the column 1 may be adjusted vertically along the column 1 or angularly about the column axis as a center, by releasing the clamp of the supporting bracket 4 and shifting the bracket 4to the desired position.

The combined elements supported from the cross-shaft 3 may be adjusted horizontally along the shaft 3 or angularly about the shaft'axis as a center, by releasing the clamps 5 of the frame bracket and shifting the bracket to the desired position. The frame of the machine and the elements supported thereby may be shifted angularly about the axis of the bearing 6 as a center, by loosening the clamps 56 of the bracket 55 and shifting the'frame to the desired position. As above noted, the angularity of the axis of the cutter 21 relative to the supporting table is also variable by means of the clamp 27. Any of these various adjustments may be made simultaneously with the normal operation of the cutter 21, thus permitting construction of'a great variety of differently formed bodies.

In order to insure ready actuation of the device, it would be necessary in the actual construction of the machine to provide suitable means, preferably in the form of weights, for balancing the various overhung swinging elements, but such means has been omitted from the present disclosure in order to avoid undesirable complication thereof, Various devices for facilitating the various adjustments of the machine in order to permit actuation thereof by a single operator, might-also be incorporated in the device without departing from the scope of the present invention. 'The disclosure as made herein is intentionally made in its simplest form in order to convey a clear understand-- ing of the construction and principle of the device. Itshould be generally understood that it is not intended to be limited to the exact details herein shown and described except as set forth in the claims for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,.

1,. In combination, an element swingable about an axis, means for simultaneouslyswinging said element about said axis and for pro ucing harmonic motion of a point on said element, a forming implement movable in a curved path by said element, means for supportinga body to be formed,'and means for permitting relative transverse movement of said supporting means and said implement.

- 2. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for producing harmonic motion of a point on said element, means for varying the limits of said harmonic motion, a forming implement movable in a curved path by said element, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

3; In combination, an element swingablo about an axis, means for simultaneously swinging said element about said axis and for producing harmonic motion of a point on said element, a second element swingable about an axis, a member connecting said elements, a forming implement movable by said member, means for supporting a body to be formed, and means for ermitting relative transverse movement 0 said supporting means and said implement.

I. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for producing harmonic motion of a point on said element, means for varying the llmits of said harmonic motion, a second element swingable about an axis, a member connecting said elements, 'a forming implement movable by said member, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.v

5. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, a forming implement movable in an elliptical path by the movement of said element, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

6. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, means for varying the limits of lateral movement of said axis, a forming implement movable in an elliptical path by the movement of said element, means for supporting a body to be formed, and means for transverse movement '0 means and said implement.

7. In combination, an element swingable about an axis, means for simultaneously said supporting swinging said element about said axis and for moving said axis laterally, a forming implement connected to a swinging point on.

said element andmovable in an elliptical path by the movement, of said element, means for varying the distance between said point of connection and said axis, means for supporting a-body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

8. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, means for varying the limits of lateral movement of said axis, a forming im lement connected to a swinging point on said element and movable in an elliptical path by the movement of said element, means for varying the permitting relative distance between said point of connection and said axis, means for supporting a body to be .formed, and means for permitting relative transverse movement of said supporting means and said implement.

9. In combination, an element swingable about an axis, means for simultaneously swingin said element about saidaxis and for moving said axis laterally, a second element swingable about an axis, a member connecting said elements, a forming implement movable b said member, means for supporting a bo y to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

10. In combination, a plurality of elements swingable about a common axis, means for simultaneously swinging said elements about said axis, means coaoting with one of said elements for producing harmonic motion of corresponding points on said elements, a forming implement movable in a curved path by another of said elements,

means for supporting a body to be formed,-

and means for permitting relative transverse movement of said supporting means and said implement.

11. In combination, a plurality of ele ments each swingable about an axis, means for simultaneously swinging said elements about their axes, means coacting with one of said elements for producing harmonic motion of points on said elements," a forming implement movable in a curved path by another of said elements, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

12. In combination, a plurality of elements swingable about a common axis, means for simultaneously swinging said elements about said axis, means ooacting with one of said elements for moving said axis laterally, a forming implement movable by another of said elements, means for supportin a body to be formed, and means for pernntting relative transverse movement of said supportin means andsaid implement.

13. In combination, a plurality of elements each swingable about an axis, means for simultaneously swinging said elements about their axes, means coacting with one of said elements for moving said axes laterally, a forming implement movable by another of said elements, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

14. In combination, a pair of elements swin ble about a common axis, means for simu taneously swinging said elements about said axis, means coacting with one of said elements for producing harmonic motion of points on said elements, a third element swingable about an independent axis, a-

member connecting said third element with the otherof said pair of elements, a forming implement carried by said member andmovable in an elliptical path by the movement of said elements, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

15. In combination, a pair of elements swingable about a common axis, means for simultaneously swinging said elements about said axis, means coacting with one of said elements for moving said axis laterally, a third elementswingable about an independent axis, a member connecting said third element with the other of said pair of elements, a forming implement carried by said member and movable by the movement of said element, means for supporting a body to benformed, and means for permitting relative transverse movement of said supporting means and said implement.

16.,In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about its pivot and for producing rectilineal movement of a point on said lever, a forming implement connected to-said lever and movable in an elliptical path by the movement of said lever, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

17. In combination, a frame, a bracket movable in said frame, a lever pivoted'in said bracket, means for simultaneously swinging said lever about its pivot and for moving said bracket to produce harmonic motion of a point on said lever, a forming implement connected to said lever and movable in a curved path by the movement of said lever, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

. 18. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about its pivot and for moving said bracket along said frame, a forming implement connected to said lever and movable in an elliptical .path by the movement of said lever, means for support-- in g a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

19. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about. its pivot and for producing rectilineal movement of a point on said lever, means for varying the limits of said rectilineal movement of said point,

III

a forming implement connected to said lever and movable in an elliptical path by the movement of said lever, means for support ing a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

20. In combination, a frame, a bracket movable in said frame, a lever pivoted-in said bracket, means for simultaneously swinging said lever about its pivot and for moving said bracket to produce harmonic motion of a point on said lever, means for varying the limits of said harmonic motion, a forming implement connected to said lever and movable in a curved path by the movement of said lever, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

21. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about its pivot and for.

moving said bracket along said frame, means for varying the limits of movement of said bracket, a forming implement connected to said lever and movable in an elliptical path by the movement of said lever, means for supporting a body to be formed, and means for permitting relative transverse movement of said supporting means and said implement.

22. In combination, an element. swingable about an axis, means for simultaneously swinging said element about said'axis and for producing harmonic motion of a point on said element, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in a curved path by the movement of said element, and means for permitting relative transverse movement of said supporting means and said implement. 23. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in anelliptical path by the movement of said element, and means for permitting relative transverse movement of said supporting means and said implement.

24:. In combination, an element svvingable about an axis, means for" simultaneously swinging said element about said axis and for producing harmonic motion of a point on said element, means for varying the limits of said harmonic motion of said point, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in a curved path by the movement of 'said element, and means for permitting relative transverse movement of said supporting means and said implement.

25. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, means for varying the limits of lateral movement of said axis, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in an elliptical path by the movement of said element, and means for permitting relative transverse movement of said supporting means and said implement.

26. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about. its pivot and for producing rectilincal movement of a point on said lever, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in an elliptical path by the movement of said lever, and means for permitting relative transverse movement of said supporting means and said implement.

27. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about its pivot and for moving said bracket to produce harmonic motion of a point on said lever, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in a curved path by the movement of said lever, and means for permitting relative transverse movement of said supporting means and said implement.

28. In combination, a frame, a bracket movable in said frame, a lever pivoted in said bracket, means for simultaneously swinging said lever about its pivot and for moving said bracket along said frame, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in an elliptical path by the movement of said le ver, and means for permitting relative transverse movement of said supporting means and said implement.

29. In combination, a frame, a bracket. movable in said frame, a pair of levers pivoted in said bracket, means for simultaneously swinging said levers about their pivots, a crosshead pivotally connected to one of said levers and movable in said frame in a direction transverse relativeto the direction of movement of said bracket, a forming implement movable by the other of said levers, and means for moving a body to be formed toward said forming imple ment.

30. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for pro ucing harmonic motion of a point on said element, a forming implement movable in a curved path by said element, means for supporting a body to be formed, and means for permitting relative transverse movement of the portion of the body being formed and of said implement.

31. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, a forming implement movable in an elliptical path by the movement of said element, means for supporting a body to be formed, and means for permitting relative transverse movement of the portion of the body being formed and of said implement.

32. In combination, an element swing-able about an axis, means for simultaneously swinging said element about said axis and for producing harmonic motion of a point on said element, a forming implement,

means for supporting a body to be formed, said implement and said supporting means being relatively movable in a curved path by the movement of said element, and means for permitting relative transverse movement of the portion of the body being formed and of said implement.

33. In combination, an element swingable about an axis, means for simultaneously swinging said element about said axis and for moving said axis laterally, a forming implement, means for supporting a body to be formed, said implement and said supporting means being relatively movable in a curved path by the movement of said element, and means for permitting relative transverse movement of the portion of the body being formed and of said implement.

In testimony whereof, the signature of the inventor is aflixed hereto in the presence of two witnesses.

. NICHOLAS GREIN. Witnesses:

HERMAN SCHU'ERMAN, OSCAR C. MEHL.

copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents, Washington, D. 0., 

